1,721,218 research outputs found
CHEMISTRY AND EMISSION RATE OF VOLATILES FROM WHITE ISLAND VOLCANO (NEW-ZEALAND)
No full textGases and a water condensate have been sampled at White Island volcano in two selected fumaroles (100 and 495-degrees-C). They have been analysed for major, minor and trace elements. Both the chemical composition of gases and thermodynamic calculations suggest that the fluids feeding high and low temperature fumaroles have the same origin, but that they follow different evolutions while ascending to the surface. Very low CO/CO2 ratios with respect to White Island previous results suggest that White Island is now in stage of reduced activity. According to the very low solubility of CO in silicate melts, an increase in activity due to a magmatic pulse should cause a significant increase of CO in the released gas phase.Long term fluxes of gases and metals have been estimated on the basis of COSPEC SO2 flux measurements performed during a medium activity stage. Our data concerning some heavy metals are similar to previous data, suggesting a constancy of the emissions during quiescent periods
Evidence of Drug-Free Interventions for Postoperative Pain Management After Total Knee Arthroplasty-Reply
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Hospital Selection in Emergency Medical Services: A Discrete Event Simulation Approach to Test Different Policies
Full text linkThe present study aims to develop a simulation model to test and compare different hospital selection policies with the purpose of improving Emergency Medical Service (EMS) systems management. The literature analysis revealed that the assignment of patients to Emergency Departments (EDs) can be based on different policies, even if the predominant one is proximity (i.e. minimization of the distance between the emergency request location and the ED). Indeed, current studies are mainly ambulance-driven with a focus on the EMS phases related to ambulance service, thus overlooking ED-related issues that are seen as part of a separate process. The purpose of this research is to show the benefits of making the hospital selection decision also considering information related to the ED case mix, the expected service throughput times, and the ED operational capacity. To this end, a Discrete Event Simulation model on was developed and implemented in AnyLogic to test different assignment policies. The best criterion for assigning patients to EDs resulted to be the minimization of the Time To Provider (TTP), considered as the time from the beginning of the ambulance journey to the beginning of the clinical evaluation in ED. Indeed, this criterion enables to significantly reduce service throughput times and overcrowding situations in the EDs. The findings of this research could support decision-makers in improving EMS performances by introducing more effective policies for hospital selection problem
Radiogenic 4He, 21Ne and 40Ar in fumarolic gases on Vulcano: implication for the presence of continental crust beneath the island
No full textFrom December 1991 to January 1993, 15 gas samples were collected from different fumaroles on the island of Vulcano (Aeolian archipelago), one of the most active volcanoes in Italy, actually in a quiescent phase, and then analysed for noble gas composition. Data on the F5 fumarole showed a large fluctuation, with a peak around November 1992. The oscillation is explained with continuous degassing of different sources: deep and more superficial. Enhanced contribution of radiogenic Ne to the crater and beach fumarolic gases were accompanied by an increase in both radiogenic He-4 and Ar-40. Remarkably, constant Ne-21/He-4 and He-4/Ar-40 ratios appeared to have been unchanged for more than a year. These observations, especially concerning the radiogenic Ne-21, suggest a deep-seated old continental crust beneath the volcano as a source of these radiogenic noble gases. Two possibilities are taken into consideration: thermo-metamorphic sedimentary formations located at the base of the volcano and/or the subducted African continental plate beneath the European plate causing the so-called subduction-type volcanism in the Aeolian islands (southern Italy)
Reply to ‘Helium isotopes in historical lavas from Mount Vesuvius’, a comment on ‘Noble gas isotopic ratios from historical lavas and fumaroles at Mount Vesuvius’ by D. Tedesco et al.
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The COVID-19 outbreak in Italy: perspectives from an orthopaedic hospital
No full textPurpose: Italy is one of the more severely affected countries in the world by the recent COVID-19 outbreak. The aim of this report is to describe how COVID-19 affected the life and organization of one of the main orthopaedic hospitals of the country, and which measures were implemented to face the outbreak. Methods: A personal interview has been conducted with four doctors involved in the management of COVID-19 outbreak in one of the main orthopaedic hospitals of Italy. Results: Hospital was re-organized, elective surgeries were cancelled, and only trauma surgeries were allowed, together with oncologic and urgent cases. Since the number of cases among patients and healthcare workers increased, the hospital management responded not only with a massive testing campaign aimed at detecting contact histories but also with an additional testing campaign for asymptomatic healthcare workers. Conclusion: The main lection is that any actions should be quick and decisive, for 1 week during the COVID-19 epidemic could make the difference
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